2018/2019 ICD-10-CM Diagnosis Code C73

Malignant neoplasm of thyroid gland

C73 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

The 2018/2019 edition of ICD-10-CM C73 became effective on October 1, 2018.

This is the American ICD-10-CM version of C73 - other international versions of ICD-10 C73 may differ.

Use Additional

Use Additional Help

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.

code to identify any functional activity

The following code(s) above C73 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Neoplasms

Note

Functional activity

All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.

Morphology [Histology]

Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.

Primary malignant neoplasms overlapping site boundaries

A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.

Malignant neoplasm of ectopic tissue

Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Neoplasms

Approximate Synonyms

Anaplastic thyroid carcinoma

Cancer from the thyroid metastatic to lymph nodes of neck

Cancer metastatic to lymph node from thyroid

Cancer of the thyroglossal duct

Cancer of the thyroid

Cancer of the thyroid, anaplastic

Cancer of the thyroid, follicular

Cancer of the thyroid, hurthle cell

Cancer of the thyroid, medullary

Cancer of the thyroid, metastatic to bone

Cancer of the thyroid, papillary

Cancer of the thyroid, with metastasis to bilateral lungs

Cancer of the thyroid, with metastasis to left lung

Cancer of the thyroid, with metastasis to lungs

Cancer of the thyroid, with metastasis to right lung

Follicular thyroid carcinoma

Hurthle cell carcinoma of thyroid

Malignant tumor of thyroid gland

Medullary thyroid carcinoma

Papillary thyroid carcinoma

Primary malignant neoplasm of thyroglossal duct

Secondary malignant neoplasm of bilateral lungs from thyroid

Secondary malignant neoplasm of left lung from thyroid

Secondary malignant neoplasm of lungs from thyroid

Secondary malignant neoplasm of lymph nodes from thyroid

Secondary malignant neoplasm of lymph nodes of neck from thyroid

Secondary malignant neoplasm of right lung from thyroid

Thyroid cancer metastatic to bone

Thyroid cancer metastatic to unspecified site

Clinical Information

A primary or metastatic malignant neoplasm affecting the thyroid gland.